Flue cleanout door assembly



Aug. 19, 1958 I K. F. TRIGGS 2,848,078

FLUE CLEANOUT DOOR ASSEMBLY Filed July 12, 1957 INVENTOR. Anwvznrf. Tels.

l E l i l United States Patent ce 2,848,078 FLUE CLEANOUT noon ASSEMBLYKenneth F. Triggs, Huntington, Ind., assignor to The Majestic Company,Inc., Huntington, Ind., a corporation Application July 12, 1957, SerialNo. 671,661

4 Claims. (Cl. 189-46) This invention relates generally to flue cleanoutdoor assemblies and, in particular, to an assembly of this type in whichthe door and the door frame are formed of sheet metal.

The advantages of economy and ease of manufacture gained by forming fluecleanout doors and their accompanying door frames of sheet metal arewell known. In fabricating these assemblies it has become conventionalto form the components for the door hinges from sections stamped fromthe frame and door blanks. This type of hinge, while lending itself tomass production, has had the disadvantage that the pivotal mounting forthe door on the frame is relatively loose, permitting considerablelateral movement of the door relative to the frame.

The primary object of the present invention is to provide a fluecleanout door assembly having a hinge connection comparable inperformance to the conventional, more costly, pin and eye door hingeconstruction.

A further object of the present invention is to provide a fluecleanoutdoor assembly of the type referred to above in which the hingecomponents are provided by stamping and forming sections of the sheetmetal door and frame blanks.

The full nature of the invention will be understood from theaccompanying drawings and the following description and claims:

Fig. 1 represents a front view of an assembly embodying the presentinvention.

Fig. 2 is an enlarged, perspective view of a detail of the hingeconstruction.

Fig. 3 is a fragmentary, sectional view taken generally along the line33 of Fig. 1.

Fig. 4 is a sectional view taken generally along the line P4 of Fig. 1.

Referring initially to Figs. 1 and 4, the flue cleanout door assemblycomprises a rectangular sheet metal door frame having rearwardly flangedouter margins and an indented inner marginal area 11. Flanges 12 areformed integrally with the door frame and extend rearwardly therefrom.

Spaced tongues are struck from the flange extending from one side of theframe and, as may best be seen in Fig. 3, are formed to provide circularhinge eyes 13 and 14 having a longitudinal axis positioned forwardly ofthe plane of the indented area bounding the inner margin of the doorframe.

A sheet metal door 16 is adapted to close the opening bounded by thedoor frame, the door being sized to fit within the indented marginalarea 11. Adjacent the hinge eye 14 a generally T-shaped slot 17 isformed in the door and the oppositely extending tongues 18 and 19thereby provided are accommodated within the hinge eye.

The extremities 21 and 22 of the tongues are bent at right angles to thelongitudinal axis of the hinge eye and have curved margins whichcorrespond generally to the curvature of the hinge eyes inner surface. AT- 2,848,078 Patented Aug. 19, 1958 2; shaped 'slot 23, identical to theslot 17, is formed in the door adjacent the hinge eye 13, the oppositelyextending tongues thereby formed having a configuration identical tothat. of tongues 18 and 19. and extendingwithin the hinge eye.

A latch 26 is pivotally carried by the door adjacent its free edgeandcooperateswith a tab 27 struck from the adjacent portion of the doorframe for locking the door in-closed position.

When assembled, it willbe evident that the doorissupportedonthehingeeyes and, asmay best be seen in Fig. 3, the curved margins ofthe tongue extremities are positioned adjacent the inner surface of thehinge eyes as the door is pivotally moved relative to the frame.

This positioning of the tongue extremities within the hinge eyes as thedoor is moved provides a stabilization of the door on the frame which issimilar to that achieved by use of the conventional cylindrical pin andeye hinge. The stabilized hinge construction thus provided is obtainedby stamping and forming sheet metal door and frame blanks, this form ofconstruction having the advantages of economy and ease of manufacturepreviously referred to.

While the invention has been illustrated and described in detail in thedrawings and foregoing description, the same is to be considered asillustrative and not restrictive in character, it being understood thatonly the preferred embodiment has been shown and described and that allchanges and modifications that come within the spirit of the inventionand the scope of the claims are also desired to be protected.

The invention claimed is:

1. A flue cleanout door assembly comprising a sheet metal door framehaving an indented marginal area defining a rectangular opening, flangesformed integrally With said frame and extending rearwardly from theinner margins thereof, spaced tongues struck from one of said flangesand formed to provide semicircular hinge eyes having their longitudinalaxes positioned forwardly of the plane of said marginal area, a sheetmetal door adapted to close the rectangular opening, a generallyT-shaped slot formed in said door adjacent each of said hinge eyes, theopposed elongated tongues thereby formed at each slot being accommodatedwithin their adjacent hinge eye and having their extremities bent into aplane normal to the longitudinal axis of the hinge eye, said extremitieshaving curved margins corresponding to the curvature of said hinge eyesto limit lateral movement of the door relative to said frame as the dooris pivotally moved on the frame.

2. A flue cleanout door assembly comprising a sheet metal door framedefining a rectangular opening, spaced tongues struck from said framealong one of its sides and formed to provide semicircular hinge eyes, asheet metal door adapted to close the rectangular opening, a generallyT-shaped slot formed in said door adjacent each of said hinge eyes, theopposed elongated tongues thereby formed at each slot being accommodatedwithin their adjacent hinge eye and having their extremities bent into aplane normal to the longitudinal axis of the hinge eye, said extremitieshaving curved margins corresponding to the curvature of said hinge eyesto limit lateral movement of the door relative to said frame as the dooris pivotally moved on the frame.

3. A flue cleanout door assembly comprising a sheet metal door framehaving an indented marginal area defining a rectangular opening, flangesformed integrally with said frame and extending rearwardly from theinner margins thereof, two spaced tongues struck from one of saidflanges and formed to provide semicircular hinge eyes having theirlongitudinal axes positioned forwardly of the plane of said marginalarea, a sheet metal door adapted to close the rectangular opening, agenerally T- shaped slot formed in said door adjacent each of said hingeeyes, the opposed elongated tongues thereby formed at each slot beingaecommodated'within their adjacent hinge eye, a member carried by eachof said elongated tongues and extending in a plane normal to thelongitudinal axis of the hinge eye, said members having curved marginscorresponding to the curvature of said hinge eyes to limit lateralmovement of. the door relative to said frame as the door is pivotallymoved on the frame.

4. A flue cleanout door assembly comprising a door frame having anindented marginal area defining a rectangular opening, semicircularhinge eyes formed along .one side of said frame having theirlongitudinal axes posi- No references cited.

